Apparatus for tying knot and method thereof

A method of tying a knot on an object by using a knot tying apparatus, comprising the steps of:

• (a) providing a thread holding frame which has a longitudinal axis and comprises an engaging arm having a catch end aligned with said longitudinal and a thread holder, which is axially extended from said longitudinal axis, having a holding groove formed thereon;
• (b) forming a loop of a tying thread by slidably engaging the tying thread at said catch end of said engaging arm and slidably holding at said holding groove of said thread holder;
• (c) axially aligning said longitudinal axis of said thread holding frame with respect to said object;
• (d) rotating said thread holding frame such that said tying thread is coiled around said object;
• (e) applying a tension force on said loop of said tying thread in such a manner that while coiling said tying thread around said object, said catch end of said engaging arm is pulled towards said holding groove of said thread holder to reduce a size of said loop of said tying thread while said loop of said tying thread is retained in a tensely tight manner;
• (f) slidably releasing said tying thread at said holding groove of said thread holder while said catch end of said engaging arm still retains said loop of said tying thread;
• and
• (g) pulling a supply end of said tying thread away from said thread holding frame to gradually disappear said loop of said tying thread held at said catch end of said engaging arm, wherein once said catch end of said engaging arm is pulled close to said object, said catch end of said engaging arm is disengaged with said tying thread such that said coils of said tying thread are tightened by pulling said supply end of said tying thread along said object to complete said knot on said object.